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1. 发明公开

EP1025359A1 HYDRAULIC PUMP JACK DRIVE SYSTEM FOR RECIPROCATING AN OIL WELL PUMP ROD 失效
标题翻译：液压驱动FOR A深泵生产原油BOOM
公开(公告)号：EP1025359A1
公开(公告)日：2000-08-09
申请号：EP98923953.8
申请日：1998-05-27
申请人： Ecoquip Artificial Lift Ltd.
发明人： SCHULTZ, Glenn , RING, Curtis, P. , GRABILL, Les
IPC分类号： F04B47/04
CPC分类号： F04B47/04
摘要： A hydraulic pump jack drive system (1) for reciprocating an oil well pump rod (6). The drive system comprises at least one hydraulic well head cylinder (2), a reversible flow hydraulic pump (7), and a master cylinder (8). The master cylinder has a free floating master piston (11) and at least one fixed bulkhead. The master cylinder also has a working fluid chamber (16) hydraulically connected to the hydraulic well head cylinder and at leat two master piston drive chambers (17, 18) hydraulicallly connected to the hydraulic pump. The hydraulic well head cylinder and the working fluid chamber are filled with a working fluid and define a working fluid system while the master piston drive chambers and the hydraulic pump are filled with hydraulic fluid and define a hydraulic drive system. Reversing the flow of the hydraulic pump causes the master piston drive chambers to be pressurized and de-pressurized on an alternating basis to reciprocally move the master piston within the master cylinder. The reciprocating master piston causes an alternating pressurizing and de-pressurizing of the working fluid chamber and the well head cylinder thereby causing the pump rod to reciprocate within the oil well.

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